public class EnumTest9 {
    private enum State {
        START  {
            public State nextState() {
                return State.RUNNING;
            }
        },

        RUNNING {
            public State nextState() {
                return State.STOP;
            }
        },

        STOP {
            public State nextState() {
                return State.STOP;
            }
        };

        public abstract State nextState();
    }

    public static void main(String[] args) {
        State state = State.START;
        
        System.out.println("Present State is " + state);
        state = state.nextState();
        System.out.println("Next State is " + state);
        state = state.nextState();
        System.out.println("Last State is " + state);
    }
}